Quote Originally Posted by SSChameleon View Post
I launched a bunch of them on my family farm in Parker growing up and never had a problem.

However, in highschool my friend set a field on fire with one of them. It wasn't the launch that did it, the rocket was too hot or had a burning ember when it came down in some tall dry grass and it burned from there.

Make sure your base is clear of combustables and you watch where the thing comes down.
The rocket motors have a little back charge that goes off a few seconds after the main burn. Its purpose is to eject the nose cone a parachute. I've had this start the rocket on fire when I used a combustible wadding. If you use proper (non-combustible) wadding, you probably won't have a problem.

I agree that rocket motors attached to toy cars and launched down the neighborhood streets is pretty good fun. In my experience, you'll need one car for each and every motor. And a rake. And a bushel basket.